Beanstalk, a high-performance, lightweight distributed memory queue system, was originally designed to reduce the page access delay of high-capacity web application systems by asynchronously executing time-consuming tasks in the background. It has supported 9.5 million User's Facebook Causes application.

Later open sourced, PostRank is now deployed and used on a large scale, processing millions of tasks every day. Beanstalkd is a typical Memcached-like design. The protocol and usage are the same, so users who have used memcached will feel that Beanstalkd looks familiar.

High performance cannot be separated from asynchronous, and asynchronous cannot be separated from queues, and internally they are the principles of the Producer-Comsumer model.

Beanstalkd’s PHP client library

#!/usr/bin/env php
<?php
define('BASE_DIR', realpath(__DIR__.'/..'));
define('PHAR_FILENAME', 'pheanstalk.phar');
define('PHAR_FULLPATH', BASE_DIR.'/'.PHAR_FILENAME);
// ----------------------------------------
reexecute_if_phar_readonly($argv);
delete_existing_pheanstalk_phar();
build_pheanstalk_phar();
verify_pheanstalk_phar();
exit(0);
// ----------------------------------------
// See: http://www.php.net/manual/en/phar.configuration.php#ini.phar.readonly
function reexecute_if_phar_readonly($argv)
{
    if (ini_get('phar.readonly') && !in_array('--ignore-readonly', $argv)) {
        $command = sprintf(
            'php -d phar.readonly=0 %s --ignore-readonly',
            implode($argv, ' ')
        );
        echo "Phar configured readonly in php.ini; attempting to re-execute:\n";
        echo "$command\n";
        passthru($command, $exitStatus);
        exit($exitStatus);
    }
}
function delete_existing_pheanstalk_phar()
{
    if (file_exists(PHAR_FULLPATH)) {
        printf("- Deleting existing %s\n", PHAR_FILENAME);
        unlink(PHAR_FULLPATH);
    }
}
function build_pheanstalk_phar()
{
    printf("- Building %s from %s\n", PHAR_FILENAME, BASE_DIR);
    $phar = new Phar(PHAR_FULLPATH);
    $phar->buildFromDirectory(BASE_DIR);
    $phar->setStub(
        $phar->createDefaultStub('vendor/autoload.php')
    );
}
function verify_pheanstalk_phar()
{
    $phar = new Phar(PHAR_FULLPATH);
    printf("- %s built with %d files.\n", PHAR_FILENAME, $phar->count());
}

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